$RNA$ interference $(RNAi)$ is used to produce transgenic plants resistant to which of the following?

Identify the transgenic crops that are modified to develop natural resistance to insects or pests from the following:

Given below are two statements:
Statement $I$: $Bt$ toxins are insect group specific and coded by a gene $cry$ $IAc$.
Statement $II$: $Bt$ toxin exists as inactive protoxin in $B. \text{ thuringiensis}$. However, after ingestion by the insect, the inactive protoxin gets converted into active form due to alkaline $pH$ of the insect gut.
In the light of the above statements, choose the correct answer from the options given below:

Give a few examples of biofortified crops. What benefits do they offer to society?

$GMO$ technology is useful for:

$A$ infects the roots of tobacco plants,which reduces the production of tobacco.